I have finally completed my design for a 18650 Li-ion battery holder. This design is part of a larger project of creating an electric longboard capable of going 30mph (48kph) with 20 miles (32 km) of range. It took numerous iterations of dimensions, and materials in order to have the batteries seamlessly snap in and out of the case, but now that I have a working design it's time to print out another nine blue ABS holders in order to create a 10 series and 5 parallel battery array with over 3000W of power.